Test your RAM - lots. Try testing your HD or changing if you have a spare. (these are the two logical culprits to me.) And run Apple Hardware test CD. Try your Cube in OSX as well - maybe you have an extention conflict. Once they are elliminated as possibles all that's left is MO and Processor. jj On Sunday, November 23, 2003, at 08:07 AM, Cube List wrote: > So, I decided to start again - reformatted the disk, loaded 9.0 from > the CD and upgraded to 9.2.1. with fresh downloads. Now, the Cube has > frozen three times with no applications running and with only the > full 9.2.1 extensions, control panels etc. loaded. It did it last > night with a Finder error 10 message.